By default you can zoom-in upto 4x to 6x in android phone camera, but using a app you can zoom-in upto 30x. “Binoculars” is an app which allow you to zoom in your phone camera for long distance photo shoots, but the picture quality depends on your phone camera and zoom in size, definitely picture will blur when you extra zoom in, but you can try this app its free and available in google plays tore.
Features
Easily zoom from 1x to 3x
Use it as binoculars or as a zoom-mirror
Take a photo of the zoomed picture
Built-in flashlight
Easy auto focus,